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FTDI speed problem

Discussion in 'Electronic Design' started by TT_Man, Sep 29, 2007.

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  1. TT_Man

    TT_Man Guest

    I have an Atmel AVR programmer working on the serial port. I have tried to
    hook in an FTDI module which works, but it's between 100 and 1000 times
    slower in its operations. Anyone know why, or a solution? Or did I miss
    something basic?
    The serial progger runs at 115K baud.
     
  2. This is a known problem. The older FTDI driver sets the big timeouts for the
    USB serial port. This can slow down the port operation tremendously. You
    need to upgrade to the latest drivers or manually hack the timeouts in the
    registry.

    Vladimir Vassilevsky
    DSP and Mixed Signal Consultant
    www.abvolt.com
     
  3. SBS

    SBS Guest

    Vladimir Vassilevsky () ha scritto:

    :: You need to upgrade to the latest drivers or manually
    :: hack the timeouts in the registry.

    What such a register are you talking about?
     
  4. OBones

    OBones Guest

    windows registry
     
  5. Rich Webb

    Rich Webb Guest

    You left off the pull-up at U6 pin 3.
     
  6. TT_Man

    TT_Man Guest

    OK thanks so far..... but I thought the FTDI would run without any drivers
    loaded........ whereabouts in the registry? Just look for FTDI in there?
    What is U6? Or was that a flippant reply?
    The module I am using is a USB232m by DLP design,..........
    Should I get a newer one?
    TIA
     
  7. SBS

    SBS Guest

    TT_Man () ha scritto:

    :: OK thanks so far..... but I thought the FTDI would run without
    :: any drivers loaded........

    Take a look at: http://www.ftdichip.com/
     
  8. TT_Man

    TT_Man Guest

    OK latest drivers loaded ( I forgot I had loaded them ages ago)... no
    improvement.:(
     
  9. SBS

    SBS Guest

  10. TT_Man

    TT_Man Guest

    Yes, but no answer yet...
     
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